not know . Suppose a researcher wants to test these results . She randomly samples 67 CFOs and finds that 40 of them get their money news from newspapers . Does the test show enough evidence to reject the findings of Robert Half International ? Use a = . 05 .
Question 4
To answer this question , use the Data Analysis Toolpack in Excel and select “ t-Test : Two-Sample Assuming Equal Variances ” from the list of available tools . Explain your answer ( how did you decide if men spend more ) and include the output table . Some studies have shown that in the United States , men spend more than women buying gifts and cards on Valentine ’ s Day . Suppose a researcher wants to test this hypothesis by randomly sampling nine men and 10 women with comparable demographic characteristics from various large cities across the United States to be in a study . Each study participant is asked to keep a log beginning one month before Valentine ’ s Day and record all purchases made for Valentine ’ s Day during that one-month period . The resulting data are shown below . Use these data and a 1 % level of significance to test to determine if , on average , men actually do spend significantly more than women on Valentine ’ s Day . Assume that such spending is normally distributed in the population and that the population variances are equal .
Men Women
107.48 125.98 143.61 45.53 90.19 56.35 125.53 80.62 70.79 46.37 83.00 44.34 129.63 75.21 154.22 68.48 93.80 85.84
126.11
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